OLED Power Board Integration for Stable Screen Enable Timing
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Solution Overview
Problem
Existing OLED driving power sources have complex architectures with independent circuit outputs, leading to large power supply boards and high production costs, and require improved power output stability and timing control.
Innovation Solution
Integration of a bridgeless PFC and auxiliary path LLC control circuit into a single control chip, optimizing the circuit structure and reducing the power supply board size while ensuring power output stability and timing control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a multi-path independent control output architecture is adopted with separate circuits for standby, PFC, and LLC control, then the time sequence control is convenient and clear, but the overall architecture becomes relatively complex and the power supply board area increases
Solution Approach 1:
The patent integrates the standby circuit, PFC control circuit, and LLC control circuit into a single integrated control chip. This merging eliminates the need for separate independent control paths while maintaining the required time sequence control functionality through centralized control logic within the chip, thus reducing architectural complexity without sacrificing operational convenience.
Solution Approach 2:
The integrated control chip performs multiple functions simultaneously: it provides standby power output, controls the PFC circuit for power factor correction, and manages the LLC resonant converter for main power output. This multi-functional integration reduces the number of separate circuits and components needed, simplifying the overall power supply architecture.
2Adaptability or versatility
If separate independent circuits are used for standby output, PFC circuit, and LLC control, then each circuit can be controlled independently, but the power supply board area becomes large and production cost increases
Solution Approach 1:
Multiple control functions that were previously distributed across separate circuits are merged into a single integrated control chip. This consolidation significantly reduces the board area required for discrete components, control circuits, and associated wiring, while the chip internally maintains the capability to control each function independently through its integrated control logic.
Solution Approach 2:
The integrated control chip contains nested functional modules within its structure, where the standby circuit, PFC control, and LLC control are hierarchically organized within the single chip package. This nesting allows independent control capabilities to be preserved at the functional level while physically consolidating all components into one compact unit.
3Reliability
If traditional bridge rectifier and separate PFC circuit are used, then the power factor correction can be achieved, but the circuit structure becomes complex and the power supply board size increases
Solution Approach 1:
The PFC control circuit is integrated with the standby circuit and LLC control into a single control chip, eliminating the need for separate discrete PFC control components. The bridgeless PFC topology further reduces component count by eliminating the traditional bridge rectifier, simplifying the circuit structure while maintaining power factor correction reliability.
Solution Approach 2:
The traditional bridge rectifier is extracted/removed from the circuit in favor of a bridgeless PFC topology. This extraction eliminates unnecessary components and simplifies the power conversion path, reducing circuit complexity while achieving the same power factor correction function through the integrated control chip.
Data Source
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AI summary
The present disclosure relates to an OLED driving power source and an OLED television. The OLED driving power source comprises a power source board connected to a motherboard and an OLED screen. The power source board comprises a standby circuit, a power supply circuit, a first conversion module, a second conversion module, and a switch. After the power source connects, the standby circuit supplies power to the motherboard and the power supply circuit. The power supply circuit starts the first conversion module to output a first voltage and a second voltage so as to supply power to the motherboard, and to output a high-voltage direct current to the second conversion module, and the switch switches the first voltage to a first enable voltage to supply power to the OLED screen. The power supply circuit starts the second conversion module to convert the high-voltage direct current into a second enable voltage so as to supply power to the OLED screen and light up the OLED screen, wherein the first conversion module comprises a bridgeless PFC circuit and an auxiliary LLC control circuit which are integrated in the same semiconductor chip package. By means of integrating the bridgeless PFC and the auxiliary LLC control circuit into one control chip, the circuit structure is optimized, the area of a power source board is reduced, and the production cost is reduced.